This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 112 |
| 2 | 2592 |
| 3 | 25424 |
| 4 | 149568 |
| 5 | 629808 |
| 6 | 2100832 |
| 7 | 5910288 |
| 8 | 14610560 |
| 9 | 32641008 |
| 10 | 67232416 |
| 11 | 129565392 |
| 12 | 236214464 |
| 13 | 410909616 |
| 14 | 686647008 |
| 15 | 1108180624 |
| 16 | 1734926592 |
| 17 | 2644311920 |
| 18 | 3935599392 |
| 19 | 5734220368 |